MTR tests fail with "mysqltest failed but provided no output"

[Laurynas Biveinis]

An example from 5.5 trunk ASan build:

rpl.rpl_row_basic_3innodb 'row' w4 [ fail ]
        Test ended at 2016-07-26 15:05:12

CURRENT_TEST: rpl.rpl_row_basic_3innodb

mysqltest failed but provided no output
The result from queries just before the failure was:
< snip >
DELETE FROM t1 WHERE a < 6 LIMIT 7;
UPDATE t1 SET a = 7 WHERE a = 3 LIMIT 7;
UPDATE t1 SET a = 8 WHERE a = 0 LIMIT 6;
INSERT INTO t1 ( a ) VALUES ( 7 );
DELETE FROM t1 WHERE a < 9 LIMIT 4;
INSERT INTO t1 ( a ) VALUES ( 7 );
INSERT INTO t1 ( a ) VALUES ( 6 );
UPDATE t1 SET a = 8 WHERE a = 3 LIMIT 4;
DELETE FROM t1 WHERE a = 2 LIMIT 9;
DELETE FROM t1 WHERE a = 1 LIMIT 4;
UPDATE t1 SET a = 4 WHERE a = 2 LIMIT 7;
INSERT INTO t1 ( a ) VALUES ( 0 );
DELETE FROM t1 WHERE a < 3 LIMIT 0;
UPDATE t1 SET a = 8 WHERE a = 5 LIMIT 2;
INSERT INTO t1 ( a ) VALUES ( 1 );
UPDATE t1 SET a = 9 WHERE a < 5 LIMIT 3;
SET GLOBAL SLAVE_TYPE_CONVERSIONS = @saved_slave_type_conversions;
include/diff_tables.inc [master:t1, slave:t1]
drop table t1;
include/rpl_end.inc

 - saving '/mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/mysql-test/var/4/log/rpl.rpl_row_basic_3innodb-row/' to '/mnt/workspace/percona-server-5.5-asan-param/BUILD_TYPE/debug-asan/Host/ubuntu-xenial-64bit/mysql-test/var/log/rpl.rpl_row_basic_3innodb-row/'

Retrying test rpl.rpl_row_basic_3innodb, attempt(2/3)...

This output does not contain enough diagnostic info and thus should be improved. One way the above could have happened is by https://bugs.mysql.com/bug.php?id=52203, thus a start could be backporting 5.7 safe_process.cc.

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PS-2160